| Electronic Kits |
Unit Cost |
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GK-02 16-LED Running Lights Kit Enlarged Pic
This kit creates a visual effect of two lighted "balls" spinning in a rectangular path.
Running speed adjustable via a trim pot (preset). |
$10.00 |
 |
GK-03 Electronic Siren Kit Enlarged Pic
This kit makes a "warble" siren sound when connected to a 9V battery. Can be used as sound indicator & warning device. |
$10.00 |
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GK-04 Double LEDs Flasher Kit Enlarged Pic
This kit makes a "warble" siren sound when connected to a 9V battery. Can be used as sound indicator & warning device. |
$7.50 |
 |
GK-05 Electronic Dice Enlarged Pic
This is the electronic version of conventional dice with one to six dots on its faces.
Press & release the button the 7 LEDs will display the outcome. |
$12.00 |
 |
GK-06 Bi-stable Touch Switch Enlarged Pic
This circuit toggles a miniature relay when you touch the sensor plate with your finger.
No IC is used & it is good for showing how transistor flip-flop works. |
$10.50 |
 |
GK-07 Light-control Relay Enlarged Pic
This circuit controls the ON/OFF of a miniature relay according to the intensity of light sensed by the CDS photo resistor.
Relay is ON under bright light & is OFF in the dark. Sensitivity is adjustable. |
$10.50 |
 |
GK-08 Melodic Door Chime Enlarged Pic
A special IC is used to generates 5 ~ 12 melodies.
Two buttons are provided to start the music. One for starting a new song. The other for repeating the same song. |
$13.00 |
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GK-08A Single Melody Module Enlarged Pic
A special IC is used to generate a simple melody.
The kit will play the melody continuously as long as power remains connected. |
$11.00 |
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GK-10 Rain/Water Level Detector Enlarged Pic
Detects rain/water & warns you with a loud beeping sound.
Can be modified to detect water level in a water tank or container. |
$10.50 |
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GK-13 Sound Actuated Switch Enlarged Pic
A very reliable sound actuated switch that turns a relay ON or OFF when it detects hand-clapping sound.
An active band-pass filter is included to filter out voice & other low frequency noise. |
$13.00 |
 |
GK-14 0.5 ~ 100 sec Timeout Timer (using NE 555 timer IC) Enlarged Pic
This timer has two buttons. Pressing "START" button briefly a relay will turn ON for a preset time set by a potentiometer.
Pressing "STOP" button will immediately stop timing & reset the relay to OFF state. |
$13.50 |
 |
GK-16 Wheel of Fortune Enlarged Pic
Pressing a button a "ball" will spin around 10 LEDs. When the button is released, they will slow down and stop a one number. Auto cut-off after a few seconds. |
$12.50 |
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GK-18 Metronome with flashing LED Enlarged Pic
Pressing a button a "ball" will spin around 10 LEDs. When the button is released, they will slow down and stop a one number. Auto cut-off after a few seconds. |
$9.00 |
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GK-23 Electronic "head" & "tail" (Coin game) Enlarged Pic
Pressing a button two LEDs will flash rapidly.
Release the button only one LED remains ON (which represents either a "head" or "tail"). |
$9.00 |
 |
GK-25 Digital Combination Lock Enlarged Pic
Locked by pressing any key. To unlock, you need to enter a 3-digit code correctly.
Relay is energized when the lock is in the "lock" state. |
$16.00 |
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GK-30 "Knight Rider" Running Lights Kit Enlarged Pic
This running lights kit has 10 LEDs arranged in one row.
A "ball" swinging back and forth on the row. |
$11.50 |
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GK-32 PWM DC Light Dimmer /Motor Speed Control Kit Enlarged Pic
This kit use Pulse-width-modulation (or PWM) to control load power (brightness of light bulb or speed of motor).
PWM does not waste energy as heat & therefore has better efficiency.)
Power MOSFET included. |
$12.00 |
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GK-34 Simple Electronic Organ Enlarged Pic
An ideal starter kit for beginners. May seem too simple for experiences hobbyists.
Circuit consists of a transistor astable multi-vibrator. |
$11.00 |
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GK-35 Door Knob Alarm Enlarged Pic
Used by hanging it on a metal doorknob.
When a visitor or burglar touches the knob, the kit produces a loud beeping sound. |
$12.00 |
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GK-160 4-Digit Up Counter Module Enlarged Pic
This module counts up from 0000 -> 9999. Two push buttons are provided for "increment" & "reset".
Switch debouncing is implemented in software to eliminate the need of an external deboucing cap. Counts up only |
$15.00 |
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GK-180 1 Sec ~ 99 Min Digital Countdown Timer Enlarged Pic
Counts down the user preset time.
Relay can be used to activate other device. Comes with a switch to toggle between second and minute. |
$40.00 |
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